Winding-off bobbin for yarn, particularly for yarn shrunken

ABSTRACT

Winding-off bobbin has a zigzag cylindrical frame, for holding the yarn package, of spring wire held between two conical flanges movable along a hollow axle. The frame is free to move up and down the flanges so as vary its diameter to accommodate any possible change in the package inner diameter, whereby the package is satisfactorily held on the bobbin at all times.

United States Patent [72] Inventor Ignace Ciniglio 40, llaldenstrasse 6000, Luzem, Switzerland [21 Appl. No. 766,205

[22] Filed Oct. 9, 1968 [45] Patented Jan. 26, 197] [32] Priority Nov. 16, 1967 [33] Switzerland [54] WINDING-OFF BOBBIN FOR YARN,

PARTICULARLY FOR SHRUNKEN YARN 3 Claims, 4 Drawing Figs.

[52] US. Cl. 242/ll8.1l [51] Int. Cl B6511 75/20, B65h 75/24 [50] Field ofSearch 242/118.2, 118.11,1l8.1,110,110.l

[56] References Cited UNITED STATES PATENTS 1,682,309 8/1928 Schoenfeld 242/ 1 18.1 lUX 2,141,610 12/1938 Little et al. 242/110 FOREIGN PATENTS 99,127 6/1940 Sweden 242/1 10.1

Primary Examiner-George F. Mautz Attorney-Singer, Stern & Carlberg ABSTRACT: Winding-off bobbin has a zigzag cylindrical frame, for holding the yarn package, of spring wire held I between two conical flanges movable along a hollow axle. The frame is free to move up and down the flanges so as vary its diameter to accommodate any possible change in the package inner diameter, whereby the package is satisfactorily held on the bobbin at all times.

PATENTED JAN 26 ISYI 7 sum 1 OF 2 h i v n a PATENHZU JAN26 I97! SHEU 2 BF 2 WINDING-OFF BOBBIN FOR YARN, PARTICULARLY FOR SHRUNKEN YARN BACKGROUND OF THE INVENTION The invention pertains to a winding-off bobbin for yarn particularly for shrunken yarn, the bobbin including means for mounting the package, which means is mounted on a spindle.

Up to the present time, the package mounting means has been a simple wooden cylinder, or a similar device. Bobbins of this kind have the disadvantage that, as the yarn of the package mounted on it is wound off onto a further bobbin, the inner yarn layers often tend to loosen from the bobbin, particularly when the yarn has previously undergone some treatment, such as in the dyehouse, that causes it to shrink. This loosening of the inner yarn layers results in the yarn being nonuniformly wound up on the further bobbin for further treatment of the yarn. Moreover, yarn packages that originally were all similar usually do not have exactly the same inner diameters after a wet operation or heat treatment, so that they are no longer suitable for the winding-off bobbins provided, and in some cases are loose on these bobbins from the very beginning.

SUMMARY OF THE INVENTION The purpose of the invention is to produce a winding-off bobbin that incorporates a springy frame of variable diameter for holding the yarn package, which frame is under constant spring force to increase its diameter.

An object of the invention is a winding-off bobbin that automatically adjusts its diameter to the inner diameter of the yarn package, whereby the latter is firmly held at all times.

This object and others of the invention will be apparent from the ensuing detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described, with reference to the FIG. of the drawing, wherein:

FIG. 1 is a side view in cross section of the winding-off bobbin of the invention;

FIG. 2 is a view in section taken along line Il-Il of FIG. 1;

FIG. 3 is a view of the adjustable stop as seen in the direction of the arrow III of FIG. 1; and

FIG. 4 is a view of a flange collar, stop removed, taken in the direction of the arrow IV of FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENT With reference to the drawings, the winding-off bobbin incorporates a spindle 1 that is coaxially surrounded by a hollow axle 2, of which each end is rotatably mounted on the spindle by means of ball bearings 3, the relative axial positions of the spindle and axle being maintained by Seeger rings 4. As seen in FIG. 1, the left part 5 of the axle embodies a smooth outer surface which carries the movable collar 6 of a conical flange 7. The outer, or left, end of the collar has a circular shoulder 8, against which a compression spring 9 pushes. The other end of this spring bears against a spring seat 10 held in position on the axle 2 by a Seeger ring 11. A further Seeger ring 12, mounted in the axle near the center thereof, limits the rightwards movement of the collar 6, which latter is illustrated in FIG. 1 in its extreme left position. The flange 7 is comprised of an outer metal truncated cone l3 and an inner metal truncated cone 14, the two truncated cones being spot welded together, for example. The large end, or base, of the truncated cone l4 incorporates a beaded edge 15. The flange 7 is attached to the collar 6 in any suitable manner, such as by welding or peening.

The right-hand portion 16 of the axle 2 embodies circular grooves 17 in its outer surface. The collar 18 of a second conical flange 7 is supported by the axle portion 16 for axial movement. The two flanges 7 are the same and have mirror symmetry, so that each diverges from the spindle 1 in the direction of the respective spindle end. As shown in FIG. 2, the outer metal truncated cone l3 embodies six rectangular slots 19, extending along the slant height and evenly spaced along the circumference of the cone. These slots expose six similarly shaped areas 20 of the upper surface of the inner metal truncated cone 14. A frame 21, composed of an endless piece of stiff spring wire, has twelve arms 22 forming a continuous, endless zigzag about an imaginary cylinder. Consecutive arms 22 are connected together by a bend 23 of nearly which rests on an exposed surface area 20 of the inner truncated cone 14, these exposed portions serving as tracks along which the bends 23 are free to slide, as the frame 21 changes in diameter.

The collar 18 embodies a radically extending blind hole 24, which holds a compression spring 25, of which the upper end bears against a bent lug 26 of a ring-shaped, adjustable stop 27, which is illustrated in FIGS. 1 and 3. The stop incorporates two mutually parallel guide edges 28 located in guide grooves 29, which are embodied in respective, oppositely located shoulders 30 of the outer end of the collar 18. The stop has a second bent lug 31 located opposite the bent lug 26. The compression spring 25 positions the stop so as to cause the second lug to press against the collar 18 and the neighboring inner edge part 32 to enter a groove 17. In this way, the axial position of the collar 18 and the associated flange 7 is fixed with respect to the axle 2. The axial position of the collar can be changed by pressing on the lug 26, against the spring 25, to free the inner edge part 32 of the stop from its groove.

The winding-off bobbin of the invention enable yarn packages of manmade fibers, such as nylon, Terylene (known in the United States under the trademark Dacron), and Grilon, to be satisfactorily wound off. The frame 21 of the invention is inserted into the package, the frame expanding until it comes to rest against the innermost layer of yarn. The frame is then mounted between the two conical flanges 7, and the collar 18 shifted sufficiently towards the center of the bobbin so as to compress the spring 9, whereupon the adjustable stop 27 is released. When the outer layers of the package have been wound off, leaving the inner layer free to expand somewhat, the frame 21 resiliently follows this expansion, so that the wound-off yarn is uniformly wound up onto a further bobbin.

The invention can be manufactured of various kinds of material; the conical flanges, for example, can be made of synthetic plastic.

Although the preferred embodiment of the invention has been described, the scope of, and the breadth of protection afforded to, the invention are limited solely by the appended claims.

I claim:

1. A winding-off bobbin for yarn, particularly suitable for shrunken yarn, including a spindle, and means mounted on said spindle for accepting and holding the yarn package, wherein the improvement comprises that said means includes a springy frame surrounding said spindle and having a variable diameter and two ends, means incorporated in said frame to put the latter constantly under a spring force urging said frame to increase its diameter, two axially spaced conical flanges surrounding said spindle and engaging said ends for holding said frame between them, and permitting said ends to slide up and down on said conical flanges, the distance between said conical flanges, measured parallel to said spindle, decreasing with increasing diameter of said springy frame, a hollow axle surrounding said spindle, a collar movable along said axle for carrying one of said conical flanges, resilient means for urging said collar and therewith the conical flange carried thereby towards the other of said conical flanges, a further collar movable along said hollow axle and carrying the other of said two conical flanges, bearing means for rotatably mounting said axle on said spindle, an adjustable stop for locking said further collar at points along said axle, a series of spaced grooves in the outer surface of said axle and located along, and transversely to, the sliding path of said further collar, and releasable resilient means for holding said stop in any one of said grooves, whereby to lock said further collar, and therefore the other of said conical flanges, in a desired position along said axle.

2. A winding-off bobbin according to claim 1, wherein said grooves in said hollow axle are circular, and wherein said stop is ring-shaped and defines an inner and an outer edge, and that a part of said stop inner edge is free to enter said grooves, and further including means incorporated in said further collar and in said stop for preventing relative axial movement therebetween, while leaving said stop free to move radially, whereby a part of said stop inner edge can be moved into or out of said grooves, to lock or to unlock the position of the other of said conical flanges.

3. A winding-off bobbin according to claim 2, in which each conical flange comprises an outer and an inner truncated cone member, a series of slots incorporated in each of said outer truncated cone members and extending radially along the cone surface thereof, whereby the exposed surface areas of said inner truncated cone members serve as tracks on which portions of the ends of the frame are free to slide, and a beaded edge formed at the base of each said'inner truncated cone members for retaining the portions of the ends of the frame on said tracks. 

1. A winding-off bobbin for yarn, particularly suitable for shrunken yarn, including a spindle, and means mounted on said spindle for accepting and holding the yarn package, wherein the improvement comprises that said means includes a springy frame surrounding said spindle and having a variable diameter and two ends, means incorporated in said frame to put the latter constantly under a spring force urging said frame to increase its diameter, two axially spaced conical flanges surrounding said spindle and engaging said ends for holding said frame between them, and permitting said ends to slide up and down on said conical flanges, the distance betweEn said conical flanges, measured parallel to said spindle, decreasing with increasing diameter of said springy frame, a hollow axle surrounding said spindle, a collar movable along said axle for carrying one of said conical flanges, resilient means for urging said collar and therewith the conical flange carried thereby towards the other of said conical flanges, a further collar movable along said hollow axle and carrying the other of said two conical flanges, bearing means for rotatably mounting said axle on said spindle, an adjustable stop for locking said further collar at points along said axle, a series of spaced grooves in the outer surface of said axle and located along, and transversely to, the sliding path of said further collar, and releasable resilient means for holding said stop in any one of said grooves, whereby to lock said further collar, and therefore the other of said conical flanges, in a desired position along said axle.
 2. A winding-off bobbin according to claim 1, wherein said grooves in said hollow axle are circular, and wherein said stop is ring-shaped and defines an inner and an outer edge, and that a part of said stop inner edge is free to enter said grooves, and further including means incorporated in said further collar and in said stop for preventing relative axial movement therebetween, while leaving said stop free to move radially, whereby a part of said stop inner edge can be moved into or out of said grooves, to lock or to unlock the position of the other of said conical flanges.
 3. A winding-off bobbin according to claim 2, in which each conical flange comprises an outer and an inner truncated cone member, a series of slots incorporated in each of said outer truncated cone members and extending radially along the cone surface thereof, whereby the exposed surface areas of said inner truncated cone members serve as tracks on which portions of the ends of the frame are free to slide, and a beaded edge formed at the base of each said inner truncated cone members for retaining the portions of the ends of the frame on said tracks. 